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Simplifying 21n + 4 = 19n + 201 + -1(-85) Reorder the terms: 4 + 21n = 19n + 201 + -1(-85) Multiply -1 * -85 4 + 21n = 19n + 201 + 85 Reorder the terms: 4 + 21n = 201 + 85 + 19n Combine like terms: 201 + 85 = 286 4 + 21n = 286 + 19n Solving 4 + 21n = 286 + 19n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-19n' to each side of the equation. 4 + 21n + -19n = 286 + 19n + -19n Combine like terms: 21n + -19n = 2n 4 + 2n = 286 + 19n + -19n Combine like terms: 19n + -19n = 0 4 + 2n = 286 + 0 4 + 2n = 286 Add '-4' to each side of the equation. 4 + -4 + 2n = 286 + -4 Combine like terms: 4 + -4 = 0 0 + 2n = 286 + -4 2n = 286 + -4 Combine like terms: 286 + -4 = 282 2n = 282 Divide each side by '2'. n = 141 Simplifying n = 141
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